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Considerations for determining optimal mouse caging density.

Charmaine Foltz1, Larry Carbone, David DeLong

  • 1Division of Veterinary Resources, National Institutes of Health, Bethesda, MD, USA foltzc@mail.nih.gov

Lab Animal
|October 25, 2007
PubMed
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Optimal housing density for laboratory mice remains undefined, as current guidelines lack scientific support. Further research is needed to establish evidence-based recommendations balancing animal well-being, ethical concerns, and practical considerations.

Area of Science:

  • Laboratory animal science
  • Animal welfare research
  • Ethology

Background:

  • Current guidelines for laboratory mouse housing density lack clear scientific justification.
  • A consensus exists that existing recommendations are arbitrary and require revision.
  • The 2006 National Meeting of the American Association of Laboratory Animal Science convened a panel to address this issue.

Framework:

  • The panel explored multifaceted factors influencing housing density decisions.
  • Key considerations included regulatory mandates, scientific data interpretation, economic factors, and ethical obligations.
  • A central theme was the need to define and measure animal well-being comprehensively.

Implementation:

  • The discussion highlighted the complexity of translating scientific data into practical housing guidelines.

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  • Interpreting the relevance of various scientific metrics for housing density was a key challenge.
  • Balancing diverse stakeholder interests, including researchers and animal welfare advocates, is crucial.

    • Implications:

    • Animal well-being, encompassing physical health, behavior, productivity, and preference, should be the primary metric for evaluating housing density.
    • The findings underscore the need for further research to develop evidence-based standards for mouse housing.
    • Establishing clear, scientifically validated guidelines will enhance laboratory animal welfare and research reproducibility.